It seems whiteboard hasn't been implemented to Spark or SparkWeb.
Which XEP suits Spark better?
While it doesn't strictly conform to any XEP you might want to take a look at the V2 Whiteboard for Spark.
Hope that helps,Ryan
Thank you Ryan,
Your whiteboard feature doesn't match any XEP list even inbox folder of xmpp extensions.
Could you share or make a public document about it? I need to implement this feature in different language.
I'm not sure what you mean by "Could you share or make a public document about it" but the source is available via svn, details are on the page that I linked to above.
I mention in stuff like XEP document. The firewall is not allowed to svn port.
Could you enable your repository access via http:// ?
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